Packing-ring for pistons.



J, T. wnsom. PACKING RING FOR PISTONS.

APPLICATION FILED AUG-29. I916.

Patentd Jan. 7,1919.

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rains FATE OFFIGE.

JUHJNT I. WILSON, 0F hLElUrh, UMIFFFIIA.

PACKING-RING FOR FIS'IUFW.

To all whom it may concern:

Be it known'that I, JoHN 'I. Wnuson, a citizen of the United States, residing at Alameda, in the county of Alameda and State of Galifornia, have invented certain new and useful Improvements in Packing- Rings for Pistons; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is the provision of an improved metallic packing ring for engine pistons actuated by any power whatever, explosive gas, compressed air, or steam, but which shall be especially adapted for use in connection with gas-engine plstons, where frequent renewals of the rings are necessary.

It is desirable that a packing ringfor gasengine pistons shall have a joint plate which will maintain its proper position relative to the ends of thering when the ring is de tached and being shipped and handled, as wellas be held against radial displacement relative to the ends of the ring when in use and further, on account of the small dimensions of the'ring, it shall not be weakened by the presence of holes to receive retainin rivets or other fastening means.

With these ends in view, my invention consists in a resilient packing ring having tongues loosely united by a joint plate provided with a base and parallel wings or flanges, the tongues being located between the wings, and the tongues andwings so fashioned that they will interlock and permit of longitudinal movements only, of the tongues relatively to the wings, or v1ce versa.

It further consists in certain novelties of construction and the combination of parts as herein set forth and claimed.

The accompanying drawing illustrates three examples ofthe embodiment of the invention constructed, and the parts combined according to the best methods of procedure I have so far devised for the purpose.

Figure 1 is a side view in elevation of one form of the improved packing ring with the parts in the positions they occupy when the ring is contracted.

Fig. 2 is a cross-section on line 2-2 of Fi. i.

Specification of Letters Patent.

Application filed August 99, 19MB. herial Ito. ilthtto.

.Fig. 3 is a top-plan view of Fig. 1 showing the ring expanded.

Fig. a is a perspective view of the joint plate and ends of the ring shown by Fig. 3.

Fig. 5 shows the ends of the expanded ring and the joint plate in position to receive the tongues.

Figs. 6 and 7 illustrate the second example or form of the packing ring. Figs. 8 and 9 illustrate the third example or form.

In Figs. 6 and 8 the rings are slightly ex- Fig. 5.

In each of the examples A designates the body of the ring; B the tongues; C the shallow seats at the inner surfaces of the ends panded and Figs. "7 and 9 are views like i of the rings; l) the base of the joint plate;

and E, the parallel flanges, or wings, integral with the base.

The joint plate is united to the tongues by expanding the resilient ring and allowing the tongues to enter the space between the flanges or wings when the ringcontracts, the free ends of the base frictionally engaging the shallow seats C, at the same time.

On reference to Fig. 2,.it will be seen that the cross-section of the wings and of a. tongue between them is the same as the crosssectional dimensions of the body of the ring.

To interlock the tongues and Wings so the tongues can move longitudinally only, rela' tively to the wings and base, and vice versa, and in no other direction, novelties in the shapes of the wings and tongues are introduced.

In Figs. 1 to 5, the sides of each tongue are provided, with beveled surfaces 1 extending outwardly toward each other, and the wings provided with inner beveled surfaces 2 extending inwardly and away from each other, matching the beveled surfaces of the tongues so they are in frictional contact and interlock against relative movements in all directions except longitudinally relative to one another.

In Figs. 6 and 7, the beveled surfaces 3 of the tongues are of less area and extend only part way down the opposite sides thereof, and in the inner surfaces of the wings have beveled surfaces 4 adjacent to their outer edges only, as clearly shown.

In Figs. 8 and 9, the outer, longitudinal The method of fashioning the several parts is well known to those skilled in the arts. The joint plate is preferable of bronze or steel, and the desired shapes of the inner surfaces of the wings may be attained by milling the same after cutting a longitudinal channel to form the wings or flanges.

The body of the rings is of cast metal, and

, the scale on the inner surface 1s retained, ex-

cept at the ends, where it is removed to form the seats for the ends of the base of the joint plate. The tongues are milled to provide the beveled surfaces in examples one and two, and the seats in the third example,'in a Well-known way.

After a joint plate has been applied to the ends of the ring, the same is contracted to the proper tension and the outer and side surfaces ground to uniform dimensions.

From the foregoing description taken in connection with the drawing, it becomes obvious that I have produced a resilient packing ring of the greatest possible strength and of very simple construction. The joint plate can not become detached before or after its application to the piston. A tight joint with the inner surface of the cylinder will be secured, and the ends of the ring and joint plate are held against relative radial displacement in use, insuring an even wear of the parts as well as a tight joint.

What I claim is:

l. A packing ring having tongues, and a joint plate with a base and wings; the space between the wings at their outer edges being narrower than the space between the wings where they join the base, and the outer or bearing edges of the tongues being narrower than the inner edges, whereby the tongues and Wings interlock so neither tongue can move radially relative to the joint plate.

2. A packing ring having centrally disposed tongues integral with the ring, and a joint plate with a base and wings, said wings being parallel, at the edges of the plate, and spaced apart to receive the tongues between them, the inner surface of each wing being a beveled surface and each tongue provided with beveled surfaces matching the inner beveled surfaces of the wings.

3. A packing ring having tongues, and a joint plate with a base and wings, the inner surface of one wing having a beveled surface and each tongue provided with a beveled surface matching the beveled surface of the wing, so that the tongues and wings will interlock, and. permit longitudinal movement of the tongues and wings relatively to one another and prevent radial displacement of the tongues and wings relatively to one another.

In testimony whereof I afiix my signature.

JOHN T. WILSON. 

